IMAGE: Alexander Yaroshenko, a member of the Cryophile winter swimming club, rubs himself with snow after swimming in the Yenisei river in the Siberian city of Krasnoyarsk, Russia, December 4, 2017. Photograph: Ilya Naymushin/Reuters

IMAGE: Yuan Meng, a four-month-old baby panda, inside his enclosure during a ceremony attended by his godmother Brigitte Macron the French president's wife, and China's Vice Minister of Foreign Affairs Zhang Yesui (both not in the picture) at the Beauval zoo in Saint-Aignan-sur-Cher, central France, December 4, 2017.Photograph: Benoit Tessier

IMAGE: Britain's Camilla, The Duchess of Cornwall, with employees in fancy dress (no prizes for guessing who they are togged up as) on brokers' annual charity day, London, December 5, 2017.Photograph: Arthur Edwards/Reuters